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Discreet Full-Stack Developer Needed (React Native + Node.js) – Modular Build in Sandbox Mode

Upwork • , US • Remote

Posted on: 25th March, 2025
Employment Type: CONTRACTOR

Job Description

We are seeking a skilled, trustworthy full-stack developer to build core modular features for a confidential mobile-first application using React Native and Node.js. This work will be done entirely off-platform (sandbox environment) with an emphasis on reusability, clean structure, and discretion.

You will not need access to the full business concept—your role will be to construct and test individual components that can later be integrated into the master application. Think of this as building the parts of a machine before seeing the machine.

📌 Responsibilities:

Build reusable React Native components with conditional navigation and user flow

Develop back-end endpoints (Node.js) for storage, authentication, and media handling

Design and implement a media upload flow (with offline capabilities & cloud sync)

Integrate third-party services (cloud storage, CDN, video processing APIs, etc.)

Maintain version control using GitHub in a sandboxed repository

Collaborate via Slack, Loom, or Trello depending on preference

📦 Stack We're Using (or Considering):

Frontend: React Native, Expo (if needed)

Backend: Node.js, Express.js

Storage: Firebase / AWS S3 / Supabase (open to your suggestion)

Auth: Firebase Auth / Magic Link / JWT

Tools: GitHub, Zapier, n8n (for automations), Stripe (for future upgrades)

Video Processing: Descript API (eventually), or recommendations welcome

✅ Ideal Candidate:

3+ years experience in React Native & Node.js

Experience with media-heavy apps (photo/video capture, uploads, compression)

Understands how to build offline-first apps with deferred upload

Ability to work without seeing the full project, and sign a strict NDA

Familiar with design systems or component libraries

Comfortable working independently and communicating clearly

🧪 Sample Tasks You May Build:

Tap-to-record video feature using native phone camera

Slide-based Q&A interface that records responses clip-by-clip

Media compression & upload flow to cloud storage

Branded slide overlay & transitions (for use in short-form content)

Modular recording tool reusable across different sections of the app

🔐 Confidentiality:

This project is highly confidential and protected by intellectual property. You will be expected to sign an NDA before beginning work. You’ll be building features based on limited briefings and won’t have access to the full product strategy—discretion and modular thinking are essential.

📆 Project Timeline:

Immediate start

Initial milestone: 4 weeks

Extension based on performance & modular delivery

💰 Budget:

Open to hourly or milestone-based contracts

Please submit your rate and availability when applying

📝 How to Apply:

Please include:

Short intro and why you're a fit

Relevant examples of apps or features you've built (especially media-related)

Preferred tools for async collaboration

Willingness to work in sandbox without full visibility (yes/no)

Willingness to sign NDA (yes/no)

Responsibilities

  • This work will be done entirely off-platform (sandbox environment) with an emphasis on reusability, clean structure, and discretion
  • You will not need access to the full business concept—your role will be to construct and test individual components that can later be integrated into the master application
  • Think of this as building the parts of a machine before seeing the machine
  • Build reusable React Native components with conditional navigation and user flow
  • Develop back-end endpoints (Node.js) for storage, authentication, and media handling
  • Design and implement a media upload flow (with offline capabilities & cloud sync)
  • Integrate third-party services (cloud storage, CDN, video processing APIs, etc.)
  • Maintain version control using GitHub in a sandboxed repository
  • Tools: GitHub, Zapier, n8n (for automations), Stripe (for future upgrades)
  • Media compression & upload flow to cloud storage
  • Branded slide overlay & transitions (for use in short-form content)
  • Modular recording tool reusable across different sections of the app
  • You’ll be building features based on limited briefings and won’t have access to the full product strategy—discretion and modular thinking are essential

Requirements

  • We are seeking a skilled, trustworthy full-stack developer to build core modular features for a confidential mobile-first application using React Native and Node.js
  • Collaborate via Slack, Loom, or Trello depending on preference
  • Frontend: React Native, Expo (if needed)
  • Storage: Firebase / AWS S3 / Supabase (open to your suggestion)
  • Auth: Firebase Auth / Magic Link / JWT
  • 3+ years experience in React Native & Node.js
  • Experience with media-heavy apps (photo/video capture, uploads, compression)
  • Understands how to build offline-first apps with deferred upload
  • Ability to work without seeing the full project, and sign a strict NDA
  • Familiar with design systems or component libraries
  • Comfortable working independently and communicating clearly
  • Tap-to-record video feature using native phone camera
  • Slide-based Q&A interface that records responses clip-by-clip
  • Willingness to work in sandbox without full visibility (yes/no)
  • Willingness to sign NDA (yes/no)
Upwork

Upwork

Technology

Job Type

CONTRACTOR

Benefits

  • Initial milestone: 4 weeks
  • Extension based on performance & modular delivery
  • Open to hourly or milestone-based contracts

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